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1. Move faster
   "The car quickened";
   - accelerate, speed up, speed
    
2. Make keen or more acute
   "quicken my appetite";
   - whet
    
3. Give life or energy to
   "The cold water quickened him";
   - invigorate
    
4. Show signs of life
   "the foetus quickened"
    
5. Give new life or energy to
   - animate, recreate, reanimate, revive, renovate, repair, vivify, revivify

Derived forms: quickens, quickened, quickening

Type of: arouse, brace, deepen, energise [Brit], energize, excite, intensify, move, perk up, stimulate, stir

Antonym: slow up

Encyclopedia: Quicken